1968705 has 20 divisors (see below), whose sum is σ = 3529812. Its totient is φ = 1049760.

The previous prime is 1968691. The next prime is 1968721. The reversal of 1968705 is 5078691.

It can be written as a sum of positive squares in 2 ways, for example, as 1327104 + 641601 = 1152^2 + 801^2 .

It is not a de Polignac number, because 1968705 - 2⁶ = 1968641 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1968705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2026 + ... + 2835.

2^1968705 is an apocalyptic number.

1968705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1968705 is a deficient number, since it is larger than the sum of its proper divisors (1561107).

1968705 is an equidigital number, since it uses as much as digits as its factorization.

1968705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4878 (or 4869 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 1968705 is about 1403.1054842741. The cubic root of 1968705 is about 125.3314934529.

The spelling of 1968705 in words is "one million, nine hundred sixty-eight thousand, seven hundred five".